Discharge mechanism for mixers



1,619,626 March 1 1927' I J. H. MOSEL DISCHARGE MECHANISM FOR MIXEBSFiled April 23. 1923 2 Sheets-Sheet 'K 5:06am.

v v 1, 19,26 March 1 19217 J. H. MOSEL 6 6 DISCHARGE MECHANISM FORMIXERS Filed April 23, 1923 2 Sheets-Sheet 2 Patented Mar. 1, 1927.

UNITED STATES PATENT OFFICE.

JOSEPH I-I. MOSEL, OF LAKEWOOD, OHIO, ASSIGNOR TO THE LAKEW'OOD'ENGINEERING COMPANY, OF LAKEWOOD, 0I-IIO,-A CORPORATION OF OHIO.

DISCHARGE MECHANISM FOR MIXERS.

Application filed April 23, 1923. Serial No. 634,093.

This invention relates particularly to'an.

apparatus or mechanism for discharging the contents of av mixing drumafter the contents have been given the desired mixing action. Moreparticularly, the device is intended for use with a revolving drum of aconcrete mixer, and provides the means by which the mixed batch may bedischarged from the drum while the drum is still rotating. i

The object of the invention is to provide a discharge mechanism for thepurpose which will efficiently discharge the batch when it is desired soto do, and which is so constructed that it will discharge'the batch fromthe mixer in a minimum interval of time.

Reference should be had to the accompanying drawings forming a part ofthis specification, in which Fig. l is a front elevation with portionsin section of a portion of a mixing machine including a revolving drum,the discharge mechanism and a portion of a frame work; F ig. 2 is anelevation with portions in section of a part of the discharge mechanism;Fig. 3 is an end elevation of a portion of a mixing machine including adrum part of the frame work and the discharge mechanism; Fig. 4 is anelevation of a portion of the discharge mechanism.

Referring to the drawings 1 is a mixing drum which in the presentinstance is shown as cylindrical, and the particular drum shown isadapted to be supported so that it may turn on tracks 2 and 3, and isdriven by means of a central gear ring 4. At one side of the machinethere is an opening 5 by which material to be mixed is charged into thedrum. Upon the opposite side there is an opening 6 through which a mixedbatch of material is discharged, and is known as the discharge opening.I p

The ,mixing drum which has been de scribed is of a type which is verywell known in the trade, and it is not intended to limit the inventionto this particular type of mixing drum.

In operating concrete mixers, particularly the element of time incharging in'a batch to be mixed, mixing the same, and discharging it, isan important element, and ma chines of this character are invariablyoperated by running the drum continuously, and therefore a successfuldischarging mechanism must be capable of discharging a. batch from thedrum without stopping the drum. The opening through which material to bemixed is charged and the opening through which a mixed batch isdischarged are necessarily limited in size because if made too large thecontents of the drum will be likely to be thrown out one of theseopenings during the mixing operation. Therefore, discharge mechanismswith which I am familiar have heretofore been limited in their capacityfor receiving and discharging a batch of material'by the size of thedischarge opening because the discharging mechanism is invariably on theoutside of the drum, and is inserted through the dis-- charge opening atthe time when it is 'dethe mixing drum rotates. The second part of themechanism may be described as a chute which normally is retained withoutthe mixing operation, and when it is desired to discharge the contentsof the mixing drum the chute portion is inserted through the dischargeopening of the mix ing drum and into position to cooperate with thestationary part of the discharge mechanism which is mounted within thedrum.

The action, during the discharging operation, may be described as thatthe stationary part being flaring receives a large quantityofa mixedbatch, as the drum rotates, much larger than the chute itself couldreceive if it alone were inserted through the discharge opening, in thedrum, and of the batch which is thus received by the stationary part ofthe mechanism, the same is directed onto the chute and out ofthe mixingdrum.

Referring to the drawings, the stationary part of the dischargemechanism is indicated at 7, and is more clearly shown in Fig. 11. Itconsists of a member which is rounding and has a back portion 7 and sideportions 7 and 7. the bottom and open at the side which is toward thedischarge opening 6 of the mixer. This member 7 is mounted on brackets 8and 9 whichare respectively carriedby uprights 10.and 11 which form partof the mixing machine frame and which extend adjacent the dischargeopening 6 of the drum. These brackets extend through the opening 6 ofthe mixing drum and are secured tothe side portions 7 and 7 of themember 7. These .opening 6 above the member 7, which might be the caseif the shield 12 were not present. The movable part of the dischargemechanism 18 more particularly shown in 1 1g. 2,

and comprises a trough-like member 13 and 11.

which at its upper end is cut in a slanting manner, as indicated at 141,the angle being such that when the trough 13 is inserted through thedischarge opening 6, the end of the trough will lie substantiallyparallel with the lower edge of the member 7, and will lie up close toit so that material will not be discharged between the members 7 and 13.The trough 13 is mounted upon two arms 15 and 16. These arms are bothpivoted upon a shaft 17 which is mounted so as to extend transversely ofthe uprights 10 The shaft may be provided with any means for turning it,such for instance as a hand lever 18. The arms 15 and 16 are mountedupon the shaft 17 upon the outside of a flange of 'theupright members 10and 11, and at approximately the portion of the arms where they aresecured to the chute members 13, these arms are bent inwardly. asindicated at 15 and 16 so as to pass across the flanges of the uprightmembers 10 and 11. Therefore, when the trough 13 is moved inwardlythrough the discharge opensecond chute member 19, and this chute member19 may be supported in any desired manner. The chute member 19 has oneor more stops, such as indicated at 20, agalnst which one or both of thearms, in the present It is open on the top and open at" instance, thearm 15, will abut and so limit the outward movement of the chute member13.

Upon what may be termedthe inner side of the chute member thereissecured a plate 21. This plat-e at one of its ends is secured at oradjacent the inner end of the chute 13, while the lower end of the plateis fastened to one or more brace rods, suchas indicated. at 22, which inturn are fastened to the chute 13. When the chute 13 is in its outwardposition, that is to say, when it is withdrawn so as to be in itsnon-discharging position, the plate 21 will be moved into a position inwhich it will close the lower portion of the discharge opening 6 of themixing drum, At this time the two plates 12 and 21 cooperate so as toeffectively prevent material which is being mixed in the drum from beingthrown out of the discharge opening. The stationary portion 7 which iswithin the mixing drum is so arranged that its surfaces converge attheir lower ends. The structure might be described as having flar ingwalls so that the upper edges of the walls enclose a greater area thanthe lower edge of the walls, Therefore, the upper portion of the member7 presents a large effective capacity for receiving portions of thebatch which, as the drum rotates will be carried up and dropped from themixing blades in the drum when theportions so carried are at the highestpoint of the drum.

When the chute 13 is in its outward, nondischarging position, concretewhich may enter the member 7 will. of course .merely pass through it,but due to the slanting walls of the member 7 it will assist materiallyin the mixing action because the material falling vertically upon theseslanting walls willv be discharged at an angle and therefore the mixingoperation will be assisted.

It will be perfectly evident that the mixer 7 will receive a muchgreater amount oil? ma, terial during the discharging operation than.could be received it the chute 13 were alone used, and this is becausethe member 7 being stationarily mounted within the mixing drum 1, may bemade of a larger size than could. be removedthrough the dischargingopening 6. The material which is cori'alled or gathered by the member 7may, however, readily be discharged through the chute 13 and so to theoutside of the mixer where it may be received by an auxiliary chute 19,or disposed of in any desired manner.

Having described my invention, I claim 1. The combination with arevoluble drum having a discharge opening, a "mechanism for dischargingthe contents of said drum comprising two trough shaped chute parts, onepart located inside of the drum and stationarily mounted with respect tothe drum, and a second part which is movable bodily from outside of thedrum through said dis:

charge opening and into co-operating relation with the first mentionedpart.

2. The combination with a revoluble drum having a discharge opening, amechanism for discharging the contents of said drum comprising twoparts, one part being a flarin g hollow member which is positionedinside of the drum, and stationarily mounted with respect to the drum,and a second part which is a chute and movable bodily from the out sideof the drum through said discharge opening into a position underlyingthe first mentioned part.

3. The combination with a revoluble drum having a discharge opening, amechanism for discharging the contents of said drum comprising twoparts, one part located inside of the drum and stationarily mounted withrespect to the drum, and a second part which is movable bodily fromoutside of the drum through said discharge opening and into co-operatingrelation with the first mentioned part, a closure plate member carriedby the said movable chute which plate stands in front of a portion ofthe discharge opening when the chute is withdrawn from the drum.

l. The combination with a revoluble drum having a discharge opening,supporting means outside of the drum, a stationary hollow member whichis located inside of the drum and supported from said supporting means,and a movable chute member which is mounted upon said supporting meansand movable bodily from without the drum through said discharge openingand into a' position in which its upper edge is contiguous to the loweredge of said hollow member to effect a discharge of material from thedrum.

5. The combination with a revoluble drum having a discharge opening, astationary hollow member positioned inside of the drum but stationarilymounted with respect to the drum, a chute member which is pivotallysupported outside of the drum for movement bodily about an axis spacedfrom the chute and means for moving said chute member whereby the chutemember may extend through the discharge opening of the drum and intoco-operativerelation with the said stationary hollow member within thedrum.

6. The combination with a revoluble drum having a discharge opening, asupporting means outside of the drum, a stationary hollow member havingoutwardly flaring walls which member is located inside of the drum andsupported from said supporting means, a movable chute member which issupported outside of the said drum said chute being movable bodilythrough said discharge opening and into a position immediately beneaththe said hollow member to thereby effect a discharge of material "fromthe drum.

7. The combination with a revoluble drum having a discharge opening,supporting means outside of said drum, a stationary hollow member havingflaring sides which is located inside of the drum and supported fromsaid supporting means the width of said hollow member being greater thanthe diameter of the said discharge opening, and a movable chute memberwhich is supported outside of said drum and movable bodily from withoutthe drum through said discharge opening and into co-operating relationwith the said stationary member to effect a. discharge of material fromthe drum.

In testimony whereof, I hereunto affix my signature.

JOSEPH H. MOSEL.

